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This CVE record has been updated after NVD enrichment efforts were completed. Enrichment data supplied by the NVD may require amendment due to these changes.
Description
When using LookupCNAME with the cgo DNS resolver, a very long CNAME response can trigger a double-free of C memory and a crash.
Metrics
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[{"vendor":"Red Hat","product":"Red Hat Enterprise Linux AppStream (v. 10)","defaultStatus":"affected","cpes":["cpe:/o:redhat:enterprise_linux:10.2"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux AppStream (v. 9)","defaultStatus":"affected","cpes":["cpe:/a:redhat:enterprise_linux:9::appstream"]},{"vendor":"Red Hat","product":"Logging Subsystem for Red Hat OpenShift 6.4","defaultStatus":"affected","cpes":["cpe:/a:redhat:logging:6.4::el9"]},{"vendor":"Red Hat","product":"Red Hat Developer Hub 1.9","defaultStatus":"affected","cpes":["cpe:/a:redhat:rhdh:1.9::el9"]},{"vendor":"Red Hat","product":"Red Hat Hardened Images","defaultStatus":"affected","cpes":["cpe:/a:redhat:hummingbird:1"]},{"vendor":"Red Hat","product":"Red Hat OpenShift Service Mesh 3.0","defaultStatus":"affected","cpes":["cpe:/a:redhat:service_mesh:3.0::el9"]},{"vendor":"Red Hat","product":"Red Hat OpenShift Service Mesh 3.1","defaultStatus":"affected","cpes":["cpe:/a:redhat:service_mesh:3.1::el9"]},{"vendor":"Red Hat","product":"Red Hat OpenShift Service Mesh 3.2","defaultStatus":"affected","cpes":["cpe:/a:redhat:service_mesh:3.2::el9"]},{"vendor":"Red Hat","product":"Red Hat OpenShift Service Mesh 3.3","defaultStatus":"affected","cpes":["cpe:/a:redhat:service_mesh:3.3::el9"]},{"vendor":"Red Hat","product":"Assisted Installer for Red Hat OpenShift Container Platform 2","defaultStatus":"affected","cpes":["cpe:/a:redhat:assisted_installer:2"]},{"vendor":"Red Hat","product":"Builds for Red Hat OpenShift","defaultStatus":"affected","cpes":["cpe:/a:redhat:openshift_builds:1"]},{"vendor":"Red Hat","product":"cert-manager Operator for Red Hat OpenShift","defaultStatus":"affected","cpes":["cpe:/a:redhat:cert_manager:1"]},{"vendor":"Red Hat","product":"Compliance Operator","defaultStatus":"affected","cpes":["cpe:/a:redhat:openshift_compliance_operator:1"]},{"vendor":"Red Hat","product":"Confidential Compute Attestation","defaultStatus":"affected","cpes":["cpe:/a:redhat:confidential_compute_attestation:1"]},{"vendor":"Red Hat","product":"Cryostat 4",
[{"vendor":"Red Hat","product":"Red Hat Hardened Images","defaultStatus":"affected","cpes":["cpe:/a:redhat:hummingbird:1"]},{"vendor":"Red Hat","product":"Red Hat OpenShift Service Mesh 3.0","defaultStatus":"affected","cpes":["cpe:/a:redhat:service_mesh:3.0::el9"]},{"vendor":"Red Hat","product":"Red Hat OpenShift Service Mesh 3.1","defaultStatus":"affected","cpes":["cpe:/a:redhat:service_mesh:3.1::el9"]},{"vendor":"Red Hat","product":"Red Hat OpenShift Service Mesh 3.2","defaultStatus":"affected","cpes":["cpe:/a:redhat:service_mesh:3.2::el9"]},{"vendor":"Red Hat","product":"Red Hat OpenShift Service Mesh 3.3","defaultStatus":"affected","cpes":["cpe:/a:redhat:service_mesh:3.3::el9"]},{"vendor":"Red Hat","product":"Assisted Installer for Red Hat OpenShift Container Platform 2","defaultStatus":"affected","cpes":["cpe:/a:redhat:assisted_installer:2"]},{"vendor":"Red Hat","product":"Builds for Red Hat OpenShift","defaultStatus":"affected","cpes":["cpe:/a:redhat:openshift_builds:1"]},{"vendor":"Red Hat","product":"cert-manager Operator for Red Hat OpenShift","defaultStatus":"affected","cpes":["cpe:/a:redhat:cert_manager:1"]},{"vendor":"Red Hat","product":"Compliance Operator","defaultStatus":"affected","cpes":["cpe:/a:redhat:openshift_compliance_operator:1"]},{"vendor":"Red Hat","product":"Confidential Compute Attestation","defaultStatus":"affected","cpes":["cpe:/a:redhat:confidential_compute_attestation:1"]},{"vendor":"Red Hat","product":"Cryostat 4","defaultStatus":"affected","cpes":["cpe:/a:redhat:cryostat:4"]},{"vendor":"Red Hat","product":"Custom Metric Autoscaler operator for Red Hat Openshift","defaultStatus":"affected","cpes":["cpe:/a:redhat:openshift_custom_metrics_autoscaler:2"]},{"vendor":"Red Hat","product":"Deployment Validation Operator","defaultStatus":"affected","cpes":["cpe:/a:redhat:deployment_validator_operator"]},{"vendor":"Red Hat","product":"External Secrets Operator for Red Hat OpenShift","defaultStatus":"affected","cpes":["cpe:/a:redhat:external_secrets_operator:1"]},{"vendor":"Red Hat","product
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[{"vendor":"Go standard library","product":"net","defaultStatus":"unaffected","collectionURL":"https://pkg.go.dev","packageName":"net","programRoutines":[{"name":"cgoResSearch"},{"name":"LookupCNAME"},{"name":"Resolver.LookupCNAME"}],"versions":[{"version":"0","lessThan":"1.25.10","versionType":"semver","status":"affected"},{"version":"1.26.0-0","lessThan":"1.26.3","versionType":"semver","status":"affected"}]}]
Initial Analysis by NIST5/12/2026 4:23:02 PM
Action
Type
Old Value
New Value
Added
CVSS V3.1
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Added
CWE
CWE-415
Added
CPE Configuration
OR
*cpe:2.3:a:golang:go:*:*:*:*:*:*:*:* versions up to (excluding) 1.25.10
*cpe:2.3:a:golang:go:*:*:*:*:*:*:*:* versions from (including) 1.26.0 up to (excluding) 1.26.3
Added
Reference Type
Go Project: https://go.dev/cl/767860 Types: Patch
Added
Reference Type
Go Project: https://go.dev/issue/78803 Types: Issue Tracking
Added
Reference Type
Go Project: https://groups.google.com/g/golang-announce/c/qcCIEXso47M Types: Mailing List, Third Party Advisory
Added
Reference Type
Go Project: https://pkg.go.dev/vuln/GO-2026-4981 Types: Vendor Advisory
CVE Modified by CISA-ADP5/08/2026 11:16:36 AM
Action
Type
Old Value
New Value
Added
CVSS V3.1
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
New CVE Received from Go Project5/07/2026 4:16:42 PM
Action
Type
Old Value
New Value
Added
Description
When using LookupCNAME with the cgo DNS resolver, a very long CNAME response can trigger a double-free of C memory and a crash.
) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.
